紫云英Astragalw sinicus L.是重要的绿肥作物,亦是重要的蜜源植物。日本每年都要进口相当数量的紫云英种子以满足生产和养蜂业的需要,主要从南朝鲜进口。80年代初,我国开始向日本出口紫云英种子。我省信阳地区作为中国种子公司紫云英种子生产基地,一直为国内南方有关省生产种子,1981年以来,开始向日本出口1981—1986年每年出口100多吨。由于信阳紫云英花期长 Astragalw sinicus L. is an important green manure crop and is also an important nectar source. Every year, Japan imports a considerable amount of asparagus seeds to meet the needs of production and beekeeping, mainly imported from south Korea. In the early 1980s, China started to export the milk vetch seeds to Japan. As a seed production base of Chinese milk vetch seedlings, Xinyang, a province in our province, has been producing seeds for the relevant southern provinces in the country. Since 1981, it began exporting to Japan with an annual export volume of over 100 tons from 1981 to 1986. As the Xinyang Astragalus long flowering